Update nl.properties

Contact me if you think something is wrong.
Merge pull request #423 from Koaieus/patch-1

Update nl.properties
added new theme
new theme
added new theme
Merge pull request #427 from ekovi/patch-4

added new theme
Merge pull request #426 from ekovi/patch-3

new theme
Merge pull request #425 from ekovi/patch-2

added new theme
denormalized fields on statuses for faster queries
add valid checksums (#428)
changed indexes
fix theme
Merge pull request #429 from Athou/denormalized

Denormalized
add valid checksum